Gas heating-stove.



No. y648,44I. Pat'ented May l, |900. A. L. SCHELLHAMMER.

GAS HEATING sTovE.

(Application led Aug. 26, 1898.)

(Nu Model.)

JQ/QLMM, Qigmw 'nds Noam! Pfrzns w. moro-umn. wAsHxNuroN/bqcz NITED @STATES PATENT OFFICE.

ALFRED L. SCHELLIIAMMER, OF WARREN, PENNSYLVANIA.

GAS H EATING-STOVE.

SPECIFICATION forming part of Letters Patent N o. 648,441, dated May 1', 1900.

Application filed August 26, 1898. Serial No. 689,587. (No model.)

1 .To LZ-Z whom it may concern,.-

Be it known that I, ALFRED L. SCHELL- HAMMER, acitizen of the United States, residing at Warren, in the county of Warren and State of Pennsylvania, have invented certain new and useful Improvements in Gas Heating- Stoves; and I do hereby declare the following to'be a full, clear, and exact description of `the invention, such as will enable others skilled in the art to which it appertains to make and use the same. Y

My present invention relates to gas-burning stoves, and more especially to that class of them in which air is heated and discharged into the room or conveyed to other apartments.

In my former patent for heaters,No.496,7 50,

A granted May 2, 1893, I have shown a construction of air-passages and exit-passages for the products of combustion whereby the latter are made to give upa great portion of their heat to the air passing'through the. heater.

In the present instance myinventionconsists in applying the general principles of construction of my heater to a stove and in certain new constructions and combinations of parts whereby a very effective air-heating stove is produced.

The bestform in which I have contemplated embodying my said invention is illustrated in the accompanying drawings and is disclosed in the following description and claims. In the said drawings, Figure l is a vertical sectional elevation; and Fig. 2 is a sectional view, on a reduced scale, of the base-flanges of the airheating drum of my burner. i

The body of the stove is made of the casing A, which is preferably provided with a supporting structure holding the casing a short distance above the floor or ground. In the lower part of the casing is a chamber d, in which is located the gas burner or burners. Within the chamber d is the drum b, closed at the top and having its sides inclining in-l wardly, as shown. The lower edges of the walls are provided with an ou twardly-extending portion or iiange b', the outer edge of which is given a turn downward. Within the drum b is. a smaller drum c, conforming to the general shape of the walls of the drum b. The top of drum c is perforated, and the lower improved other burners.

`forming a mixing-chamber.

edges of its walls rest upon or are connected with a plate c', extending outwardly to the downwardly-extending edges of the flange b. While this is shown as my preferred form, it will be understood that the plate c may be omitted and the drum secured to the bottom of the casing A. The bottom of the casing VA is provided with an opening, admitting air to the interior of `the drum c, and the space between the two drums forms a passage for the air to support combustion. The burner B is located in the anges b of the drum Z), and said flanges are perforated adjacent to theburuerwithfineperforations. Theilames from the burner will heat the adjacent walls of the drum l?, and the air in its downward course after passing through the perforations in the top of the drum c are brought into contact with these walls of the drum b and is heated thereby. Y i

The opening in the bottom of the casing A is preferably provided with an oscillatingor slide valve a', by which the supply of air to the burner can be regulated.

The walls of the druml b,.adjacentto the burner, are preferably coated with asbestos, as shown at b2, to protect the met-al walls from injury from the llame of the burner, and the walls of the casing A may be provided with glazed openings o? opposite the asbestos when desired. i i

As will be seen from an enamination of Fig. 2, the air heated in the drum b is also mixed with the gas before it reaches the burner. This mixing of air with the gas is effected in substantially the samelnanner as in many A gas-supply pipe b3 extends within the open end of a pipe B', communieating with the body of the burner B and The gas in the supply-pipe being under more or less pressure in passing out of the pipe b3 acts as an injector, drawing air into the open end of the mixing-chamber B in a wellknown way. The open end of the pipe B or mixing-chamber being within the base of the drum b, the heated air is drawn into the pipe and mixed with the gas.

The burner and its air-heating drum may be circular, or the drum lnay be of rectangular form, with a burner upon two or more of its sides. This construction supplies heated ICO air to the burners, thereby. increasing the efthe products of combustion pass directly into tectiveness ot the same. y reason or the ne perforations through Which=the airis forced to passv before reaching the iiame of the burner the burning of thegas is notai'- fected by the openingand shutting of doors-V or the like fluctuations of the atmosphere of the room in which the stove is located.

The radiator or air-heater above the b urner is in its lower lpart made likethe corresponding part of theconstruction shown in my .n prior patent, hereinbefore referred to.

Above "the chamber a there is a verticallydisposed `cylindrical or elongated chamber D of other formthan circular, having a partij- `tion d'withinvit dividing the chamber into two passages, one of which' communicates with the chamber a and which forms the outI let for the productsl of combustion. These products return through the other passage and then pass outward into the lower part of an annular chamber E-,surrounding the chamber 1 ),fw'hich-is provided with a single passage circling around the vsameand gradually nearingthe top ofthe radiator, at which point kthe productsof @combustion leave the radiator and passte the chiinneyor other uptake. This annular chamber .has air-'tubes fv. ...iso

air-tubes aslhav'ingtheinlet ends-ofthe'same extending outwardlyand connecting withjap-.

erturesji'n the 'body of the casing A. If; preferred, theymight extend down to the boa-oni initio;

.n l 1 `Above, them'ainbodyof'lthe casing A 'the f .chamber VDlis greatly expanded into"aghollovv/'ffV Thev laterally-'extending portionsof this cap or dome may reachgto'or beyond lthe 'walls ofthe casing A,- ,andwithinf Y. ,e thiscap or; dome isa deflector e., 'whichjrests f upon and vis connected with the partitiondin- -thechamber-l). l This partition d extendson each side ofthe cap or dome to the'top'of the same, so that the heatedjproductsjof-combuse tion varev forcedoutward to the extreme outer' partsof the cap orv dome `before returning downwardly through the second passage of the chamber D'.

. The outer Walls of the casing Aare extended upwardly .and form the annular discharge-opening 0,3 for the heated air. This outlet for the heated air instead of being wholly open entirely around the stovewill preferably be spanned by a grating Vof. some sort whose interstices will afford an ample outlet for the air. v l 1 In case it is desired to conduct the heated air'to another apartment an inclosing vhood connecting with a conduit will be added, as shown in dotted lines.

It will be seen that as the'air rises through the tubes or pipes f it will come into lcontact with the under surface of the cap or dome D and will be additionally heated thereby. As

said Vcap or dome rro'in t-ne cnamoer a, said cap will be heated to a higher degree of heat than the air-pipes f,fwhich theyencounter later. l

Vhat I claim, and desire to secureby vLetters Patent, is-` a A v.1. In an air-heater, the combination with the main casing, of the annular radiator having air-passages extending vertically there- "through, a rising and a diving iiuewithin saidradiator, a hollow cap or dome connected ,with saidrising and diving flues and extending outwardly over the said air-passages, substantially as described. f j

.2. 'In an air-heater, the lcombination with the main casing, of the annular radiator having Vair-passages extending vertically therethrough, a rising and diving ilue within said radiator, a hollow cap or dome connected with said rising and diving vlines extending outwardly over said air-passages, 'and a deflector Withinsaid cap or dom`e,'substantially as de- In' yan a airfheater, the combination with kthemain casing, ot'k theannular radiator having an annularly-extending passage for conducting-the productsfof combustionthrough f passing vertically throughit, and in so far` as already stated; the radiation is muchzthe- 'same as that shown in my said former patent', except that -Ihave in this instance shownthe a tortuons-.course'from the bottom to thetop lof the radiaton'arising and a 'diving ue Within said radiator-,the diving'flueconnect-` ingfwith the passage'throfugh the radiator, air-passagesfextendin g vertically through the radiator, and -a hollowcap or dome connected with said rising and diving-fines, said cap or dome extending laterally over 'the saidfairpassages, substantially. as described.

4. .Thecombinationwitha gas-burner, of an-air-heatingdrumfor supplying heated air .to 'said burner, said "air heating andsupply- .ing means includingnumerous small openings for admitting airto'the drum, said openingsbeing located "in Vclose 'proximity to a large portion of the'heating-*surface of the drum, andv means for delivering the heated air to the burner, substantially as described. y.5. ".lhec'ombinationwith a gas-burner, of van `air-heating drum having an extended horizontalinitial heating-surface, means forsupplying. air to thedrum including numerous IOO IIO

small openings for delivering air upward evenly over the said heating-surface, and means for delivering vthe heated air to the burner, substantially as described.

6. The combination with a gas-burner for heating purposes, of an air-heating device operatively connected therewith and supplying heated air tothe mixing-chamber of the burner and also supplying it ina inely-divided state to the flame of the burner, substantially as described. i

7. The combination with a gas-burner, of

'an air-heating drum for heating air, means for supplying air to said drum, including numerous small openings for delivering air evenly over a largeportion of the heatingsurface of lthe drum, and means for conductend of the mixing-chamber of the burner being located in the heated-air conduit between the heating-surfaces of the drum and the burner, substantially as described.

In testimony whereof I affix my signature in the presence of two witnesses.

A. L. SCHELLHAMMER.

Witnesses:

W. I-I. ALLEN, G. H. WHITAKER. 

